Rock legends Sir Paul McCartney, Eric Clapton, Roger Daltrey and Ronnie Wood came together at the weekend (30Jun-1Jul12) to celebrate pop artist Sir Peter Blake's 80th birthday.The foursome posed for pictures as they partied at London's Royal Albert Hall in honour of Blake, famous for designing the cover of The Beatles' album Sgt. Pepper's Lonely Hearts Club Band. The artist, who currently has an exhibition at the concert hall, was seen enjoying a drink with MCCartney and his wife Nancy Shevell, and later cut a cake in front of guests including Beatles producer Sir George Martin and Led Zeppelin guitarist Jimmy Page, according to Britain's Daily Mail newspaper.